*{
	box-sizing: border-box;				
}

body > div{
	background-color: #999999;
	/*border: 1px solid blue;*/
	margin: 10px;
	margin-left: 100px;
	width: 200px;
	height: 100px;
	/*height: 100px;*/
}

div .special {
	background-color: red;
	/*width: 100px;
	height: 100px;*/		
	max-height: 50px;
	font-family: "微软雅黑";
	font-size: 14px;
	border-top-left-radius:10px;
	text-align: center;
	float: left;
}

#id1{
	background-color: green;
}

[data-age='13']{
	color: red;
}

[href]{
	color: green;
}

[target=_blank]{
	background-color:yellow;
}

[type="text"]:focus{
	border-color: #0000FF;
}

.fixed-demo{
	right: 0px;
	bottom: 0px;
	position: fixed;
}

.absolute-demo {
	position: relative;
}

.absolute-demo div {
	right: 0px;
	bottom: 0px;
	background-color:#0000FF;
	position: absolute;
}

.center-demo{
	position: relative;
}

.center-demo div{
	width: 100px;
	height: 50px;
	background-color: green;
	position: absolute;
	left: 50%;
	margin-left: -50px;
	top: 50%;
	margin-top: -25px;
	text-align: center;
	line-height: 50px;
}
